Miscellaneous changes split from https://codereview.webrtc.org/1230503003 .

webrtc/common_audio/vad/vad_core_unittest.cc

Index: webrtc/common_audio/vad/vad_core_unittest.cc
diff --git a/webrtc/common_audio/vad/vad_core_unittest.cc b/webrtc/common_audio/vad/vad_core_unittest.cc
index 77db3d8ed23fdc450fe0a18010d496330c5644e7..00f58414773893bfb8459c17459f891d2ef4a084 100644
--- a/webrtc/common_audio/vad/vad_core_unittest.cc
+++ b/webrtc/common_audio/vad/vad_core_unittest.cc
@@ -83,7 +83,7 @@ TEST_F(VadTest, CalcVad) {
   // Construct a speech signal that will trigger the VAD in all modes. It is
   // known that (i * i) will wrap around, but that doesn't matter in this case.
   for (int16_t i = 0; i < kMaxFrameLength; ++i) {
-    speech[i] = (i * i);
+    speech[i] = static_cast<int16_t>(i * i);
   }
   for (size_t j = 0; j < kFrameLengthsSize; ++j) {
     if (ValidRatesAndFrameLengths(8000, kFrameLengths[j])) {